With following patch testcase passes:
Index: fold-const.c
===================================================================
--- fold-const.c (Revision 227111)
+++ fold-const.c (Arbeitskopie)
@@ -2110,6 +2110,17 @@ fold_convert_const (enum tree_code code, tree type
else if (TREE_CODE (arg1) == REAL_CST)
return fold_convert_const_fixed_from_real (type, arg1);
}
+ else if (TREE_CODE (type) == VECTOR_TYPE)
+ {
+ if (TREE_CODE (arg1) == VECTOR_CST
+ && code == NOP_EXPR
+ && TYPE_VECTOR_SUBPARTS (type) == VECTOR_CST_NELTS (arg1))
+ {
+ tree r = copy_node (arg1);
+ TREE_TYPE (arg1) = type;
+ return r;
+ }
+ }
return NULL_TREE;
}
Index: cp/constexpr.c
===================================================================
--- constexpr.c (Revision 227111)
+++ constexpr.c (Arbeitskopie)
@@ -1441,8 +1441,6 @@ cxx_eval_call_expression (const constexpr_ctx *ctx
bool
reduced_constant_expression_p (tree t)
{
- /* Make sure we remove useless initial NOP_EXPRs. */
- STRIP_NOPS (t);
switch (TREE_CODE (t))
{
case PTRMEM_CST:
